First published in Bolted #2 2016.
Q: Can I re-use bolts?
A: Before you re-use bolts, you should always consider the security level of the assembly and economic factors. Operators often lack important information, such as if the assembly working load or working temperature have been exceeded. As fatigue cracks are difficult to detect, the use of a new bolt (screw, nut and washer) is often recommended for security and legal reasons.You can re-use bolts:
If re-usability has been specified by the assembly designer
If a bolt failure does not endanger its environment, for example the full structure, the safety of operators or others. The assembly is not critical.
For temporary/emergency use. A periodic control is recommended. (…)
